Originally Posted by rudions
still then it should be 9.9 on windows 7 rating .it reconize ram but dosent give better preformance
Assuming you meant to type 7.9, and are still wondering why your experience index isn't reflecting your changes of having 4gb, or 6gb at any given time in your machine, then hopefully this will make sense.
Olli is partially correct. Well, he's 100% correct in my opinion, but its not the only factor. In addition, capacity isn't everything. Even if your stress tests/benchmarking utilities would benefit from the additional 2gb of memory, the other factors such as chip quality, speed, and timings weigh the same, if not more heavily than capacity.
In addition, what makes you think you should be getting an Experience index of 7.9 on the memory component, given the specs of your configuration? Whether you have 2,4,6, or 20gb of memory, I'm almost positive that the top tiered scores are reserved for those components relative to the top of their scale, specifically some extreme speeding ddr3 memory. With that, I don't see how/why you feel there's an issue with your memory. Even with my limited ddr2 experience (took a hiatus from the computer tech world towards the end of the ddr mainstream and missed ddr2), I'd still say based on the info you've provided, you're not doing bad at all.